/*=========================================================================
 Authors: Michael Kazhdan and Matthew Bolitho
 at Johns Hopkins University, 2006-10

 Copyright (c) 2006-10, Michael Kazhdan and Matthew Bolitho, 
 Johns Hopkins University.
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

 Redistributions of source code must retain the above copyright notice,
 this list of conditions and the following disclaimer.
 Redistributions in binary form must reproduce the above copyright notice,
 this list of conditions and the following disclaimer in the documentation
 and/or other materials provided with the distribution.
 Neither the name of the Johns Hopkins University nor the names of its 
 contributors may be used to endorse or promote products derived from this 
 software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
=========================================================================*/

#ifndef __VECTORIMPL_HPP
#define __VECTORIMPL_HPP

////////////
// Vector //
////////////
template<class T>
inline Vector<T>::Vector()
{
	m_N = 0;
	m_pV = 0;
}

template<class T>
inline Vector<T>::Vector( const Vector<T>& V )
{
	m_N = 0;
	m_pV = 0;
  Resize(V.m_N);
	memcpy( m_pV, V.m_pV, m_N*sizeof(T) );
}

template<class T>
inline Vector<T>::Vector( size_t N )
{
	m_N=0;
	m_pV=0;
	Resize(N);
}

template<class T>
inline void Vector<T>::Resize( size_t N )
{
	if(m_N!=N){
		if(m_N){delete[] m_pV;}
		m_pV=NULL;
		m_N = N;
		if(N){m_pV = new T[N];}
	}
	memset( m_pV, 0, N*sizeof(T) );
}

template<class T>
inline Vector<T>::Vector( size_t N, T* pV )
{
	Resize(N);
	memcpy( m_pV, pV, N*sizeof(T) );
}

template<class T>
inline Vector<T>::~Vector()
{
  Resize(0);
}

template<class T>
inline Vector<T>& Vector<T>::operator = (const Vector& V)
{
	Resize(V.m_N);
	memcpy( m_pV, V.m_pV, m_N*sizeof(T) );
	return *this;
}

template<class T>
inline size_t Vector<T>::Dimensions() const
{
  return m_N;
}

template<class T>
inline void Vector<T>::SetZero(void)
{
  for (size_t i=0; i<m_N; i++)
  {
    m_pV[i] = T(0);
  }
}

template<class T>
inline const T& Vector<T>::operator () (size_t i) const
{
	assert( i < m_N );
	return m_pV[i];
}
template<class T>
inline T& Vector<T>::operator () (size_t i)
{
	return m_pV[i];
}

template<class T>
inline const T& Vector<T>::operator [] (size_t i) const
{
	return m_pV[i];
}

template<class T>
inline T& Vector<T>::operator [] (size_t i)
{
	return m_pV[i];
}

template<class T>
inline Vector<T> Vector<T>::operator * (const T& A) const
{
	Vector V(*this);
	for (size_t i=0; i<m_N; i++)
		V.m_pV[i] *= A;
	return V;
}

template<class T>
inline Vector<T>& Vector<T>::operator *= (const T& A)
{
	for (size_t i=0; i<m_N; i++)
		m_pV[i] *= A;
	return *this;
}

template<class T>
inline Vector<T> Vector<T>::operator / (const T& A) const
{
	Vector V(*this);
	for (size_t i=0; i<m_N; i++)
		V.m_pV[i] /= A;
	return V;
}

template<class T>
inline Vector<T>& Vector<T>::operator /= (const T& A)
{
	for (size_t i=0; i<m_N; i++)
		m_pV[i] /= A;
	return *this;
}

template<class T>
inline Vector<T> Vector<T>::operator + (const Vector<T>& V0) const
{
	Vector<T> V(m_N);
	for (size_t i=0; i<m_N; i++)
		V.m_pV[i] = m_pV[i] + V0.m_pV[i];

	return V;
}

template<class T>
inline Vector<T>& Vector<T>::AddScaled(const Vector<T>& V,const T& scale)
{
	for (size_t i=0; i<m_N; i++)
		m_pV[i] += V.m_pV[i]*scale;

	return *this;
}

template<class T>
inline Vector<T>& Vector<T>::SubtractScaled(const Vector<T>& V,const T& scale)
{
	for (size_t i=0; i<m_N; i++)
		m_pV[i] -= V.m_pV[i]*scale;

	return *this;
}

template<class T>
inline void Vector<T>::Add(const Vector<T>& V1,const T& scale1,const Vector<T>& V2,const T& scale2,Vector<T>& Out){
	for (size_t i=0; i<V1.m_N; i++)
		Out.m_pV[i]=V1.m_pV[i]*scale1+V2.m_pV[i]*scale2;
}

template<class T>
inline void Vector<T>::Add(const Vector<T>& V1,const T& scale1,const Vector<T>& V2,Vector<T>& Out){
	for (size_t i=0; i<V1.m_N; i++)
    {
		Out.m_pV[i]=V1.m_pV[i]*scale1+V2.m_pV[i];
    }
}

template<class T>
inline Vector<T>& Vector<T>::operator += (const Vector<T>& V)
{
	for (size_t i=0; i<m_N; i++)
		m_pV[i] += V.m_pV[i];

	return *this;
}

template<class T>
inline Vector<T> Vector<T>::operator - (const Vector<T>& V0) const
{
	Vector<T> V(m_N);
	for (size_t i=0; i<m_N; i++)
		V.m_pV[i] = m_pV[i] - V0.m_pV[i];

	return V;
}

template<class T>
inline Vector<T> Vector<T>::operator - (void) const
{
	Vector<T> V(m_N);

	for (size_t i=0; i<m_N; i++)
		V.m_pV[i] = -m_pV[i];

	return V;
}

template<class T>
inline Vector<T>& Vector<T>::operator -= (const Vector<T>& V)
{
	for (size_t i=0; i<m_N; i++)
		m_pV[i] -= V.m_pV[i];

	return *this;
}

template<class T>
inline T Vector<T>::Norm( size_t Ln ) const
{
	T N = T();
	for (size_t i = 0; i<m_N; i++)
		N += pow(m_pV[i], (T)Ln);
	return pow(N, (T)1.0/Ln);	
}

template<class T>
inline void Vector<T>::Normalize()
{
	T N = 1.0f/Norm(2);
	for (size_t i = 0; i<m_N; i++)
		m_pV[i] *= N;
}

template<class T>
inline T Vector<T>::Length() const
{
	T N = T();
	for (size_t i = 0; i<m_N; i++)
		N += m_pV[i]*m_pV[i];
	return sqrt(N);	
}

template<class T>
inline T Vector<T>::Dot( const Vector<T>& V ) const
{
	T V0 = T();
	for (size_t i=0; i<m_N; i++)
		V0 += m_pV[i]*V.m_pV[i];

	return V0;
}



/////////////
// NVector //
/////////////
template<class T,int Dim>
inline NVector<T,Dim>::NVector()
{
	m_N = 0;
	m_pV = 0;
}

template<class T,int Dim>
inline NVector<T,Dim>::NVector( const NVector<T,Dim>& V )
{
	m_N = 0;
	m_pV = 0;
	Resize(V.m_N);
	memcpy( m_pV, V.m_pV, m_N*sizeof(T)*Dim );
}

template<class T,int Dim>
inline NVector<T,Dim>::NVector( size_t N )
{
	m_N=0;
	m_pV=0;
	Resize(N);
}

template<class T,int Dim>
inline void NVector<T,Dim>::Resize( size_t N )
{
	if(m_N!=N){
		if(m_N){delete[] m_pV;}
		m_pV=NULL;
		m_N = N;
		if(N){m_pV = new T[Dim*N];}
	}
	memset( m_pV, 0, N*sizeof(T)*Dim );
}

template<class T,int Dim>
inline NVector<T,Dim>::NVector( size_t N, T* pV )
{
	Resize(N);
	memcpy( m_pV, pV, N*sizeof(T)*Dim );
}

template<class T,int Dim>
inline NVector<T,Dim>::~NVector()
{
  Resize(0);
}

template<class T,int Dim>
inline NVector<T,Dim>& NVector<T,Dim>::operator = (const NVector& V)
{
	Resize(V.m_N);
	memcpy( m_pV, V.m_pV, m_N*sizeof(T)*Dim );
	return *this;
}

template<class T,int Dim>
inline size_t NVector<T,Dim>::Dimensions() const
{
  return m_N;
}

template<class T,int Dim>
inline void NVector<T,Dim>::SetZero(void)
{
  for (size_t i=0; i<m_N*Dim; i++)
  {
    m_pV[i] = T(0);
  }
}

template<class T,int Dim>
inline const T* NVector<T,Dim>::operator () (size_t i) const
{
	assert( i < m_N );
	return &m_pV[i*Dim];
}

template<class T,int Dim>
inline T* NVector<T,Dim>::operator () (size_t i)
{
	return &m_pV[i*Dim];
}

template<class T,int Dim>
inline const T* NVector<T,Dim>::operator [] (size_t i) const
{
	return &m_pV[i*Dim];
}

template<class T,int Dim>
inline T* NVector<T,Dim>::operator [] (size_t i)
{
	return &m_pV[i*Dim];
}

template<class T,int Dim>
inline NVector<T,Dim> NVector<T,Dim>::operator * (const T& A) const
{
	NVector<T,Dim> V(*this);
	for (size_t i=0; i<m_N*Dim; i++)
		V.m_pV[i] *= A;
	return V;
}

template<class T,int Dim>
inline NVector<T,Dim>& NVector<T,Dim>::operator *= (const T& A)
{
	for (size_t i=0; i<m_N*Dim; i++)
		m_pV[i] *= A;
	return *this;
}

template<class T,int Dim>
inline NVector<T,Dim> NVector<T,Dim>::operator / (const T& A) const
{
	NVector<T,Dim> V(*this);
	for (size_t i=0; i<m_N*Dim; i++)
		V.m_pV[i] /= A;
	return V;
}

template<class T,int Dim>
inline NVector<T,Dim>& NVector<T,Dim>::operator /= (const T& A)
{
	for (size_t i=0; i<m_N*Dim; i++)
		m_pV[i] /= A;
	return *this;
}

template<class T,int Dim>
inline NVector<T,Dim> NVector<T,Dim>::operator + (const NVector<T,Dim>& V0) const
{
	NVector<T,Dim> V(m_N);
	for (size_t i=0; i<m_N*Dim; i++)
		V.m_pV[i] = m_pV[i] + V0.m_pV[i];

	return V;
}

template<class T,int Dim>
inline NVector<T,Dim>& NVector<T,Dim>::AddScaled(const NVector<T,Dim>& V,const T& scale)
{
	for (size_t i=0; i<m_N*Dim; i++)
		m_pV[i] += V.m_pV[i]*scale;

	return *this;
}

template<class T,int Dim>
inline NVector<T,Dim>& NVector<T,Dim>::SubtractScaled(const NVector<T,Dim>& V,const T& scale)
{
	for (size_t i=0; i<m_N*Dim; i++)
		m_pV[i] -= V.m_pV[i]*scale;

	return *this;
}

template<class T,int Dim>
inline void NVector<T,Dim>::Add(const NVector<T,Dim>& V1,const T& scale1,const NVector<T,Dim>& V2,const T& scale2,NVector<T,Dim>& Out){
	for (size_t i=0; i<V1.m_N*Dim; i++)
		Out.m_pV[i]=V1.m_pV[i]*scale1+V2.m_pV[i]*scale2;
}

template<class T,int Dim>
inline void NVector<T,Dim>::Add(const NVector<T,Dim>& V1,const T& scale1,const NVector<T,Dim>& V2,NVector<T,Dim>& Out){
	for (size_t i=0; i<V1.m_N*Dim; i++)
		Out.m_pV[i]=V1.m_pV[i]*scale1+V2.m_pV[i];
}

template<class T,int Dim>
inline NVector<T,Dim>& NVector<T,Dim>::operator += (const NVector<T,Dim>& V)
{
	for (size_t i=0; i<m_N*Dim; i++)
		m_pV[i] += V.m_pV[i];

	return *this;
}

template<class T,int Dim>
inline NVector<T,Dim> NVector<T,Dim>::operator - (const NVector<T,Dim>& V0) const
{
	NVector<T,Dim> V(m_N);
	for (size_t i=0; i<m_N*Dim; i++)
		V.m_pV[i] = m_pV[i] - V0.m_pV[i];

	return V;
}

template<class T,int Dim>
inline NVector<T,Dim> NVector<T,Dim>::operator - (void) const
{
	NVector<T,Dim> V(m_N);

	for (size_t i=0; i<m_N*Dim; i++)
		V.m_pV[i] = -m_pV[i];

	return V;
}

template<class T,int Dim>
inline NVector<T,Dim>& NVector<T,Dim>::operator -= (const NVector<T,Dim>& V)
{
	for (size_t i=0; i<m_N*Dim; i++)
		m_pV[i] -= V.m_pV[i];

	return *this;
}

template<class T,int Dim>
inline T NVector<T,Dim>::Norm( size_t Ln ) const
{
	T N = T();
	for (size_t i = 0; i<m_N*Dim; i++)
		N += pow(m_pV[i], (T)Ln);
	return pow(N, (T)1.0/Ln);	
}

template<class T,int Dim>
inline void NVector<T,Dim>::Normalize()
{
	T N = 1.0f/Norm(2);
	for (size_t i = 0; i<m_N*3; i++)
		m_pV[i] *= N;
}

template<class T,int Dim>
inline T NVector<T,Dim>::Length() const
{
	T N = T();
	for (size_t i = 0; i<m_N*Dim; i++)
		N += m_pV[i]*m_pV[i];
	return sqrt(N);	
}

template<class T,int Dim>
inline T NVector<T,Dim>::Dot( const NVector<T,Dim>& V ) const
{
	T V0 = T();
	for (size_t i=0; i<m_N*Dim; i++)
		V0 += m_pV[i]*V.m_pV[i];

	return V0;
}

#endif
